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<pre id='vimCodeElement'>
<span class="Comment">//: Jump primitives</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
JUMP<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"jump"</span>] = JUMP<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case JUMP: <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"ingredient 0 is "</span> << current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">0</span>]<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
current_step_index<span class="Delimiter">()</span> += current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">0</span>]<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to instruction "</span> << current_step_index<span class="Delimiter">()</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario jump_can_skip_instructions)</span>
recipe main [
jump <span class="Constant">1</span>:offset
<span class="Constant">1</span>:integer<span class="Special"> <- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: ingredient 0 is 1</span>
<span class="traceAbsent">-run: instruction main/1</span>
<span class="traceAbsent">-mem: storing 1 in location 1</span>
<span class="Delimiter">:(scenario jump_backward)</span>
recipe main [
jump <span class="Constant">1</span>:offset <span class="Comment"># 0 -+</span>
jump <span class="Constant">1</span>:offset <span class="Comment"># | +-+ 1</span>
<span class="Comment"># \/ /\ |</span>
jump -<span class="Constant">2</span>:offset <span class="Comment"># 2 +-->+ |</span>
] <span class="Comment"># \/ 3</span>
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: instruction main/2</span>
<span class="traceContains">+run: instruction main/1</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
JUMP_IF<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"jump-if"</span>] = JUMP_IF<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case JUMP_IF: <span class="Delimiter">{</span>
vector<long long int> arg0 = read_memory<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">0</span>]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>arg0<span class="Delimiter">.</span>size<span class="Delimiter">()</span> == <span class="Constant">1</span><span class="Delimiter">);</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"ingredient 0 is "</span> << arg0[<span class="Constant">0</span>]<span class="Delimiter">;</span>
if <span class="Delimiter">(</span>!arg0[<span class="Constant">0</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jump-if fell through"</span><span class="Delimiter">;</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"ingredient 1 is "</span> << current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">1</span>]<span class="Delimiter">.</span>name<span class="Delimiter">;</span>
current_step_index<span class="Delimiter">()</span> += current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">1</span>]<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to instruction "</span> << current_step_index<span class="Delimiter">()</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario jump_if)</span>
recipe main [
jump-if <span class="Constant">999</span>:literal <span class="Constant">1</span>:offset
<span class="Constant">1</span>:integer<span class="Special"> <- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: ingredient 1 is 1</span>
<span class="traceContains">+run: jumping to instruction 2</span>
<span class="traceAbsent">-run: instruction main/1</span>
<span class="traceAbsent">-mem: storing 1 in location 1</span>
<span class="Delimiter">:(scenario jump_if_fallthrough)</span>
recipe main [
jump-if <span class="Constant">0</span>:literal <span class="Constant">1</span>:offset
<span class="Constant">123</span>:integer<span class="Special"> <- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: jump-if fell through</span>
<span class="traceContains">+run: instruction main/1</span>
<span class="traceContains">+mem: storing 1 in location 123</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
JUMP_UNLESS<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"jump-unless"</span>] = JUMP_UNLESS<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case JUMP_UNLESS: <span class="Delimiter">{</span>
vector<long long int> arg0 = read_memory<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">0</span>]<span class="Delimiter">);</span>
assert<span class="Delimiter">(</span>arg0<span class="Delimiter">.</span>size<span class="Delimiter">()</span> == <span class="Constant">1</span><span class="Delimiter">);</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"ingredient 0 is "</span> << arg0[<span class="Constant">0</span>]<span class="Delimiter">;</span>
if <span class="Delimiter">(</span>arg0[<span class="Constant">0</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jump-unless fell through"</span><span class="Delimiter">;</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"ingredient 1 is "</span> << current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">1</span>]<span class="Delimiter">.</span>name<span class="Delimiter">;</span>
current_step_index<span class="Delimiter">()</span> += current_instruction<span class="Delimiter">().</span>ingredients[<span class="Constant">1</span>]<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span><span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to instruction "</span> << current_step_index<span class="Delimiter">()</span>+<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario jump_unless)</span>
recipe main [
jump-unless <span class="Constant">0</span>:literal <span class="Constant">1</span>:offset
<span class="Constant">1</span>:integer<span class="Special"> <- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: ingredient 1 is 1</span>
<span class="traceContains">+run: jumping to instruction 2</span>
<span class="traceAbsent">-run: instruction main/1</span>
<span class="traceAbsent">-mem: storing 1 in location 1</span>
<span class="Delimiter">:(scenario jump_unless_fallthrough)</span>
recipe main [
jump-unless <span class="Constant">999</span>:literal <span class="Constant">1</span>:offset
<span class="Constant">123</span>:integer<span class="Special"> <- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+run: ingredient 0 is 999</span>
<span class="traceContains">+run: jump-unless fell through</span>
<span class="traceContains">+run: instruction main/1</span>
<span class="traceContains">+mem: storing 1 in location 123</span>
</pre>
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